oj.uz

답안 #572149

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
572149 2022-06-03T19:12:04 Z MohammadAghil Jail (JOI22_jail) C++14
0 / 100
 7 ms 12080 KB 
      #include <bits/stdc++.h>
//   #pragma GCC optimize ("Ofast,unroll-loops")
// #pragma GCC target ("avx2")
    using namespace std;
  typedef long long ll;
   typedef pair<int, int> pp;
    #define er(args ...) cerr << __LINE__ << ": ", err(new istringstream(string(#args)), args), cerr << endl
      #define per(i,r,l) for(int i = (r); i >= (l); i--)
        #define rep(i,l,r) for(int i = (l); i < (r); i++)
           #define all(x) x.begin(), x.end()
              #define sz(x) (int)(x).size()
                  #define pb push_back
                      #define ss second
                           #define ff first
                                   void err(istringstream *iss){}template<typename T,typename ...Args> void err(istringstream *iss,const T &_val, const Args&...args){string _name;*iss>>_name;if(_name.back()==',')_name.pop_back();cerr<<_name<<" = "<<_val<<", ",err(iss,args...);}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll mod = 1e9 + 7, maxn = 5e5 + 5, lg = 22, inf = ll(1e9) + 5;
ll pw(ll a,ll b,ll md=mod){if(!b)return 1;ll k=pw(a,b>>1ll);return k*k%md*(b&1ll?a:1)%md;}

vector<int> adj[maxn];
bool is[maxn];

bool dfs(int r, int g, int p = -1, int cr = 0){
     cr += is[r];
     if(r == g) return cr <= 1;
     for(int c: adj[r]) if(c - p && !dfs(c, g, r, cr)) return false;
     return true; 
}

void solve(){
     int n; cin >> n;
     rep(i,0,n) adj[i].clear();
     rep(i,1,n) {
          int u, v; cin >> u >> v; u--, v--;
          adj[u].pb(v), adj[v].pb(u);
     }
     int m; cin >> m;
     vector<int> s(m), t(m);
     rep(i,0,m) cin >> s[i] >> t[i];
     vector<int> id(m); iota(all(id), 0);
     do{
          fill(is, is + n, false);
          rep(i,0,m) is[s[i]] = true;
          bool ok = true;
          rep(i,0,m){
               if(!dfs(s[id[i]], t[id[i]])){
                    ok = false;
                    break;
               }
               is[s[id[i]]] = false, is[t[id[i]]] = true;
          }  
          if(ok){
               cout << "Yes\n";
               return;
          }
     }while(next_permutation(all(id)));
     cout << "No\n";
}

int main(){
     cin.tie(0) -> sync_with_stdio(0);
     int t; cin >> t;
     while(t--) solve();
     return 0; 
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 12072 KB Output is correct
3 Incorrect 7 ms 12036 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Incorrect 6 ms 11988 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Incorrect 6 ms 11988 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Incorrect 6 ms 11988 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Incorrect 6 ms 11988 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 12080 KB Output is correct
2 Correct 5 ms 12068 KB Output is correct
3 Correct 6 ms 11988 KB Output is correct
4 Incorrect 7 ms 12076 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 12072 KB Output is correct
3 Incorrect 7 ms 12036 KB Output isn't correct
4 Halted 0 ms 0 KB -